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换元法是中学数学的常用技巧之一,巧用换元法分解因式,常能收到事半功倍之效.其中常用换元技巧主要有以下几种:
Replacement method is one of the common techniques used in middle school mathematics. Cleverly using the substitution method to resolve factors, it is often able to receive more effective results. Among them, the commonly used ones are: